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常见的上领淋巴结计吸细胞学中，对于分化极差、癌细胞大小近似淋巴细胞的鼻咽癌转移的涂片，尤其在原发灶夫明时明确诊断很困难，因此寻找一种能够鉴别肿瘤良恶性的方法十分重要。自1987年由Crocker等首先应用核仁组成区嗜银蛋白（ggNOR）染色方法研究，发现它对肿瘤的鉴别诊
Common upper-neck lymph node aspiration cytology, for poorly differentiated, approximate size of cancer cells of lymphocytic metastases of nasopharyngeal smear, especially when the primary tumor was clear when the diagnosis is very difficult to find a way to identify The benign and malignant tumor is very important. Since 1987, Crocker and other first application of nucleolar organizer region of argyrophilic protein (ggNOR) staining method and found that its differential diagnosis of the tumor